createFromStream<TParam, TResult> method
Creates a RxCommand from an "one time" observable. This is handy if used together with a streame generator function.
provider
: provider function that returns a new Observable that will be subscribed on the call of execute
canExecute
: observable that can bve used to enable/diable the command based on some other state change
if omitted the command can be executed always except it's already executing
isExecuting will issue a bool
value on each state change. Even if you
subscribe to a newly created command it will issue false
emitLastResult
will include the value of the last successful execution in all CommandResult events unless there is no new result.
For the Observable<CommandResult>
that RxCommand implement this normally doesn't make sense
if you want to get an initial Result with data==null, error==null, isExceuting==false
pass
emitInitialCommandResult=true
.
By default the results Observable and the RxCommand itself behave like a PublishSubject. If you want that it acts like
a BehaviourSubject, meaning every new listener gets the last received value, you can set emitsLastValueToNewSubscriptions = true
.
Implementation
static RxCommand<TParam, TResult> createFromStream<TParam, TResult>(StreamProvider<TParam, TResult> provider,
{Observable<bool> canExecute,
bool emitInitialCommandResult = false,
bool emitLastResult = false,
bool emitsLastValueToNewSubscriptions = false}) {
return new RxCommandStream<TParam, TResult>(
provider, canExecute, emitInitialCommandResult, emitLastResult, emitsLastValueToNewSubscriptions);
}